spring boot + angular 2+ 404 not found

import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.resource.PathResourceResolver;


import java.io.IOException;

@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/**/*")
                .addResourceLocations("classpath:/static/")
                .resourceChain(true)
                .addResolver(new PathResourceResolver() {
                    @Override
                    protected Resource getResource(String resourcePath, Resource location)
                            throws IOException {
                        Resource requestedResource = location.createRelative(resourcePath);
                        return requestedResource.exists() && requestedResource.isReadable()
                                ? requestedResource
                                : new ClassPathResource("/static/index.html");
                    }
                });
    }
}

spring boot 로 angular production mode 를 배포했을 때 /to/path 경로로 갔다 리로드를 하면 404 not found 가 뜬다

그럴때 처리방법

node.js 로 하면 angular universal 모듈로 처리하면 된다.. ( 훨씬 간단하지만 프로젝트가 나눠져서 보기 힘듬 )

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